LogrobotLM

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FANUC Alarm PALL-220 — Message buffer to PC is full

FANUC PALL-220 (“Message buffer to PC is full”): More than 20 messages have not been read by PTPC. First check: Check the MOTET communication and PTPC status.

Updated 2026-09-17 · LogrobotLM reference

Description

More than 20 messages have not been read by PTPC. The communication is slow, or has stopped.

Remedy

Check the MOTET communication and PTPC status.

Related codes

PALL-216SlipSheet pos. must be cartesian representationPALL-217Position is not reachablePALL-221PTPC message type … - illegal data receivedPALL-222PTPC command ignored, in wrong mode

Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →